1213231100377 has 2 divisors, whose sum is σ = 1213231100378. Its totient is φ = 1213231100376.

The previous prime is 1213231100329. The next prime is 1213231100387. The reversal of 1213231100377 is 7730011323121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1129790423056 + 83440677321 = 1062916^2 + 288861^2 .

It is an emirp because it is prime and its reverse (7730011323121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213231100377 - 2²³ = 1213222711769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213231100387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606615550188 + 606615550189.

It is an arithmetic number, because the mean of its divisors is an integer number (606615550189).

Almost surely, 2^{1213231100377} is an apocalyptic number.

It is an amenable number.

1213231100377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213231100377 is an equidigital number, since it uses as much as digits as its factorization.

1213231100377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

Adding to 1213231100377 its reverse (7730011323121), we get a palindrome (8943242423498).

The spelling of 1213231100377 in words is "one trillion, two hundred thirteen billion, two hundred thirty-one million, one hundred thousand, three hundred seventy-seven".